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单项选择题
A.twice the crankshaft speed
B.half the crankshaft speed
C.the same speed as that of the crankshaft
D.a speed independent of that of the crankshaft
单项选择题
A.failing to reach rated speed
B.knocking under maximum load
C.hunting or surging under light load
D.overspeeding and running away
单项选择题
A.cooling water pump
B.nozzle cooling passages
C.cylinder jackets
D.heat exchanger
单项选择题
A.the power stroke
B.the compression stroke
C.low load operation only
D.periods of standby
单项选择题
A.475 RPM
B.950 RPM
C.1900 RPM
D.2400 RPM
单项选择题
A.suction pressure regulator
B.thermostatic bypass valve
C.sea water temperature
D.water level in the expansion tank
单项选择题
A.operated manually once an hour
B.operated until the engine has started
C.placed into operation only at maximum load
D.adjustable to meet lubrication requirements
单项选择题
A.remove suspended and precipitated solids from the boiler water
B.completely drain the boiler in an emergency situation
C.prevent hardened scale deposits in the water drum
D.remove floating impurities from the oily water surface
单项选择题
A.around the engine
B.around the cooler
C.to the expansion tank
D.overboard
单项选择题
A.seawater contamination
B.frequent surface blows
C.dissolved oxygen deaeration
D.frequent bottom blows